David Grabbe, asserting that the parable of the leaven hidden in the meal and the parable of the treasure hidden in the field serve as the juxtaposition of a negative and positive symbol (respectively, leaven and treasure), identifies a stark contrast between evil corruption and godly treasure, hidden for totally different reasons. Jesus never intended the church be hidden from the world, but instead that if should serve as a light or a city on a hill. This public display would occur after His death and resurrection up until His Second Coming. The superior wisdom of God, more valuable than gems and precious metals, has been hidden from the world at large, but given to chosen or called-out-ones solely at the discretion of God the Father. It is this hidden godly wisdom which enables God's saints to counteract the hidden leaven of corrupt doctrine. Wisdom that inspires an iron-clad faith (like the Centurion's) is more precious than gold which perishes. This kind of faith, belief, and trust is meaningful and valuable to our Creator.
Richard Ritenbaugh, citing Francis Shaeffer's observation, that bitterness rather than doctrine divides and estranges one member from of Christ's Body from another, suggests that individuals often look for a 'doctrinal' reason to cover up the real reason for leaving a congregation. Perhaps the principal cause of the estrangement between brethren can be explained by the Parable of the Leaven in Matthew 13:33, an image of a process of exaggerated growth, parallel to the mustard see analogy, in which a garden plant unnaturally grows into an imposing tree. Although many Bible Commentaries have assumed that both of these similes simply mean what started small will grow to something large, they fail to take into account the necessity of symbols remaining consistent beginning with the first mention in scripture. Leaven symbolizes corruption from sin, even as we examine the wave loaves, composed of humans laden from sin (from which they have repented). As ambassadors for Christ, already having our citizenship in Heaven, we still have sin in our nature. Interestingly, the grain offering in Leviticus 3, designated for the peace offering or fellowship offering did not contain leaven. As a biblical symbol, leaven stands for hypocrisy, false teachings, sexual immorality, vile corruption, malice and wickedness, a condition which will not exist in God's Kingdom, but is rampant in the Church of God today as it syncretizes doctrine with 'knowledge' derived from the Babylonic worldly philosophies. The woman sneaking in the leaven with three measures of meal in Matthew 13 evidently represents the Church, who surreptitiously mixed Christ's pure doctrine with a little sourdough of worldly wisdom, puffing up the church with intellectual vanity, but destroying the prospects of unity or reconciliation between the numerous splinter groups. With this leavening, Satan has destroyed the relationship between church members by corrupting the doctrines that had bound us together.
John Ritenbaugh asks the question, "How much leavening would God allow to infiltrate into the church, society, or the individual before He steps in to correct it?" Leaven can symbolically represent false teaching, as in the stifling traditions of the Pharisees, the skepticism of the Sadducees, and the secularism of Herod, all producing deadly cynicism and pessimism. With immense forbearance and patience, God carefully timed the cumulative wickedness of a people (when every thought would become saturated with evil) before He intervened. Likewise, we have no insight as to how much sin God will tolerate in the church or our own lives before He will sternly intervene. The tares and wheat (sin and righteousness, heresies and truth, or unconverted and converted) must coexist until the harvest when the fruit will become clearly seen, at which time a separation and judgment will take place, when the good will be contrasted from the evil. In the meantime, the persecution we receive now will show God definitively where our loyalties lie.
Most commentators see in the Parable of the Leaven a positive message of the growth of the church. Martin Collins, however, shows that they have it exactly backward—Jesus' parable is a warning of internal corruption!
John Ritenbaugh highlights a dangerous flaw in our evaluation of religious truth. If the God of the Bible (who cannot lie and is not a God of confusion) were involved in the religions of the world—mainstream Christianity and Islam - there would be no strife between them. The bitter fruits indicate that the god of both of them is not the God of the Bible, but instead the god of this world, Satan the Devil, who inspires warfare and adversarial relationships. The false teachings of this world's belief systems can adversely erode and destroy the faith in members of the greater church of God. "The Way" is distinct from the world's belief systems, polluted by the tolerant and inclusive attitudes of the liberal far left - a position shockingly embraced by a large segment of evangelical, born-again Christians.
Richard Ritenbaugh reiterates that the Kingdom of God or of Heaven has past (Hebrews 11:13), present (Hebrews 12:22), and future (Hebrews 12:28) aspects. The Kingdom parables primarily provide instruction for the present aspect, a time when struggle and suffering are part of the mix (Matthew 11:12). The first parables of Matthew 13 reveal Satan's battle plan to: (1) attack in the early stages of development, (2) infiltrate with secret agents, (3) cause the church to grow large and worldly, exceeding God's prescribed limits, and (4) corrupt by false doctrine, destroying the relationships between the brethren. These parables describe the last quarter century in the church of God.
John Ritenbaugh declares that the holy days are reliable, effective, multifaceted teaching tools, emphasizing spaced repetition to reinforce our faulty memories and drive the lesson deep into our thinking. The most effective learning involves drills or exercises, inscribing the lessons on our mind (Deuteronomy 16:3). Memory is enhanced as we continually rehearse a concept until it becomes deeply burned into our character, giving us self-mastery, integrity, and godliness. Like physical leavening, sin has the tendency to puff up and spread, taking effect immediately and irreversibly. We can only be free if we put out sin - false doctrine (I Corinthians 5:6-8) - and eat unleavened bread - or ingest wholesome undefiled teaching and practice righteousness (Titus 2:14).
Christian freedom has nothing to do with location but how we think. Like Israel on the edge of the Red Sea, we are too willing to turn back to our enslavement. Like Christ, carrying the instrument of our death (the cross), we also carry with us the instrument of our own death (our carnal minds). By imbibing on God's Word (maturing from milk to meat), we will incrementally displace our carnality, responding to God's shaping of our character to attain the Kingdom of God and membership in His Family.
John Ritenbaugh, expanding on God's swearing by His Holiness, adds that when God looks upon people who call themselves by His name, He expects to see certain family characteristics- exemplified by holiness, purity, and morality. Amos indicated that God could not identify these characteristics in people appropriating His name. God's called out ones are obligated to avoid defilement from any source whatsoever, taking special care not to mix God's truth with worldly tradition and rank paganism, forming a syncretistic religion. Amos, using the unflattering image of cows of Bashan, censures the women of Israel (normally the safeguard for the family morality) for abandoning morality, living exclusively for pleasure, materialism, and self-centeredness (often at the expense of the poor and needy), while practicing devoutly a form of syncretistic religion. God, through His prophets, warns that God (with a motive of love) will chasten His people with increasing severity until they repent and begin to reflect His characteristics.